本文介绍了集程控和共电式扩音功能于一身的HCBK系列程控防爆扩音对讲电话机的工作原理。

In this paper, the principle of HCBK flame -proof telephone with program control and common-battery telephone public-address is introduced.

youdao

本文介绍了集程控和共电式扩音功能于一身的HCBK系列程控防爆扩音对讲电话机的工作原理。

In this paper, the principle of HCBK flame -proof telephone with program control and common-battery telephone public-address is introduced.

youdao